6998651 has 4 divisors (see below), whose sum is σ = 7634904. Its totient is φ = 6362400.

The previous prime is 6998627. The next prime is 6998681. The reversal of 6998651 is 1568996.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-6998651 is a prime.

It is a super-2 number, since 2×6998651² = 97962231639602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6998681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318110 + ... + 318131.

It is an arithmetic number, because the mean of its divisors is an integer number (1908726).

Almost surely, 2^6998651 is an apocalyptic number.

6998651 is a deficient number, since it is larger than the sum of its proper divisors (636253).

6998651 is a wasteful number, since it uses less digits than its factorization.

6998651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636252.

The product of its digits is 116640, while the sum is 44.

The square root of 6998651 is about 2645.4963617439. The cubic root of 6998651 is about 191.2808291822.

The spelling of 6998651 in words is "six million, nine hundred ninety-eight thousand, six hundred fifty-one".